/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.runtime.concurrent;

import org.apache.flink.util.Preconditions;

import java.util.concurrent.Callable;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

/**
 * Adapter class for a {@link ScheduledExecutorService} which shall be used as a
 * {@link ScheduledExecutor}.
 */
public class ScheduledExecutorServiceAdapter implements ScheduledExecutor {

	private final ScheduledExecutorService scheduledExecutorService;

	public ScheduledExecutorServiceAdapter(ScheduledExecutorService scheduledExecutorService) {
		this.scheduledExecutorService = Preconditions.checkNotNull(scheduledExecutorService);
	}

	@Override
	public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
		return scheduledExecutorService.schedule(command, delay, unit);
	}

	@Override
	public <V> ScheduledFuture<V> schedule(Callable<V> callable, long delay, TimeUnit unit) {
		return scheduledExecutorService.schedule(callable, delay, unit);
	}

	@Override
	public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) {
		return scheduledExecutorService.scheduleAtFixedRate(command, initialDelay, period, unit);
	}

	@Override
	public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) {
		return scheduledExecutorService.scheduleWithFixedDelay(command, initialDelay, delay, unit);
	}

	@Override
	public void execute(Runnable command) {
		scheduledExecutorService.execute(command);
	}
}
